Well, from my experience the backpack itself doesn't add to the weight of supplies, and when adjusted properly I find there's plenty of support and the backpack won't leave you fatigued. Personally it's been the most comfortable backpack I've ever used, and I haul my laptop and all my books everywhere. It distributes the weight very well.
Hi dear friend, our backpack is very padded not even on the back but also on the strap and the handle.
According to the feedbacks our customers gave us, they feel comfy when wearing it, the features are excellent too.
Hope it helps. Looking forward to your purchase.